Diffuser with a detachable deflector member



u 25 1951 H. DANINHIRSCH I 2,558,421

DIFFUSER WITH A DETACHABLE DEFLECTOR MEMBER Filed March 5, 1948 INVENTOR. HARRY DAN\NH\RSC.H

ATTORNEY.

Patented June 26, 1951 DIFFUSER WITH A DE-TACHABLE DEFLECTOR MEMBER Harry Daninhirsch, Brooklyn, N. Y., assignor, by mesne assignments, to W. B. Connor Engineering Corporation, New York, N. Y., a corporation of New York Application March 5, 1948, Serial No. 13,148

4 Claims.

This invention relates to an improved gas or air diffuser, and more particularly, to a ceiling diffuser to be connected with an air duct for sup-' plying air to rooms or other enclosures for ventilation, air conditioning systems and the like.

In a distributing system for air or gas comprising a number of diffusers arranged along the ceiling of a room, said diffusers are generally set into the ceiling and are substantially flush therewith. Heretofore conventional air diffusers have been designed in such a manner as to render the damper, where such is provided, and other parts inaccessible for Cleaning and other purposes once the diffuser has been permanently secured in place in an air distributing installation.

Accordingly, it is a primary object of the pres ent invention to provide a diffuser constructed and arranged in such a manner that the damper and operating mechanism therefor will be readily accessible at all times for convenient inspection, cleaning, repair or adjustment, as required by the conditions of use. The object is achieved by 1 providing a diffuser having an outer casing of any conventional type and a deflector element which may be detachably associated with said casing, the deflector element being securable on a plurality of mounting bolts or the like depending from said casing and being provided with apertures of such size and disposition as to allow the heads of the mounting bolts to be passed through the respective apertures. Each bolt preferably carries a fixed washer and a movable Washer with a compression spring interposed therebetween. The deflector element is installed by being pressed against the movable washers and is securely and detachably held in position by means of slotted washers disposed'between the outer surface of the deflector element and a respective bolt-head, the tension of the springs being suflicient to hold the deflector element in assembled position.

Another object of the invention is the provision of a diffuser of the character indicated, the diffuser having incorporated in its structure a damper element operatively associated with the deflector element so that both the damper element and deflector element are readily removable from and reassemblable with the outer casing of the diffuser as required by the conditions of use.

The foregoing objects as well as additional objects and advantages of the invention will be readily apparent in the course of the following detailed description taken in connection with the accompanying drawing, which illustrates a pre- 2 ferred embodiment of the invention, and wherein: I

Fig. 1 is a bottom plan view of a diffuser constructed in accordance with the present invention, the deflector element being shown in' assembled position and with one of the slotted looking washers being shown withdrawn from its locking position.

Fig. 2 is a fragmentary vertical sectional view taken on line 2-2 of Fig. 1 and showing adjacent portions of the supply duct and ceiling.

Fig. 3 is a fragmentary view similar to, Fig. 2

' but illustrating the manner of removing the deflector element and components carried thereby from association with the outer casing by withdrawing the slotted washers from locking position.

Referring now to the drawing in greater detail, the diffuser comprises an outer casing III which may be formed with a tubular neck portion II. Neck portion II may be secured to a collar or similar fitting (not shown) disposed at the outlet opening of the supply duct (not shown).

Outer casing I0 is preferably formed in the conventional manner with an outwardly flaring deflector surface I2 on the interior thereof and with a depending flange I3 providing discontinuity in the deflector surface in order to deflect the diffused stream of air slightly downwardly. Said casing may also be provided with a rim I 4 forengaging the angle iron ring I4a fixed to the undersurface of ceiling C, as shown at I 5 in Figs. 2 and 3.

Casing I 0 preferably defines a flat substantially horizontal annular portion I6 intermediate flaring deflector surface I2 and neck portion I I in order to receive the fixed mounting elements or. bolts II having enlarged heads I'Ia, said, bolts, being fixedly secured to said casing as by means of nuts I8, by threaded engagement with said casing, or in any other desired manner.

In order to render the deflector element I 9 capable of removable association with mounting elements or bolts I I, each of said bolts is provided with a flxed washer 20 held against upward motion as by a pin 2|, a movable washer. 22 and a, compression spring 23 interposed between said fixed washer and saidmovable washer, and normally urging the latter against the bolt-.

head IIa.

Deflector element I9 is preferably provided with a dished central portion 24 and an outer flange portion 25. Said flange portion is formed with a plurality of mounting apertures 26, each having a diameter sufliciently great to pass over a respective bolt-head I'Ia when the deflector element I9 is associated with or removed from the mounting bolts I'I. After pressing the deflector element I9 slightly inwardly of bolt-heads He, said deflector element may be. releasably secured in assembled position by means of slotted. retaining elements or washers 21 inserted between the outer surface of the deflector element and the respective bolt-heads I'Ia, as clearly shown in Figs. 1 and 2.

Fig. 3 illustrates the reverse operation of removing the deflector element I9 by withdrawing the slotted retaining washers 21 from locking position, which may be expeditiously accomplished simply by first pressing said deflector element slightly inwardly to overcome the tension of springs 23 and to remove said retaining washers, after which the deflector element may be withdrawn.

As thus far described the invention may be embodied in a diffuser without a damping arrangement. However, as shown in the drawing, by way of .example, a damper cylinder 23 may be mounted on a threaded stem 29 passing through a central aperture in deflector element I9 so that said cylinder may be moved upwardly and downwardly with neck portion I I by means of extenal hub 30 .to enlarge or diminish the size of the air passage defined between the casing I0, cylinder 28 and deflector element I9 and thereby to adjustably vary the volume of dis charge of air through the diffuser. It will be understood that the presence of a damping arrangement or the particular type of damping arrangement used, where such arrangement is provided will be determined by the particular conditions to be encountered in a given case.

Since certain additional modifications may be made in the diffuser of the present invention without departing from the scope thereof, it is intended that all matter contained in the foregoing description and shown in the accompanying drawing be interpreted merely as illustrative and not in a limiting sense.

What is claimed is:

1. A diffuser comprising an outer casing defining an outwardly flaring portion and a central tubular neck portion, a deflector element adapted for detachable association in spaced relationship with said outer casing, a threaded stem mounted centrally upon said deflector ele ment, a damper member carried by said stem and movable within said neck portion, a plurality of mounting elements depending from said outer casing, each of said elements having an enlarged head, each of said elements having a stop member, a movable washer and a compression spring interposed therebetween, said deflector element having a plurality of mounting apertures therein, each of said apertures having a diameter slightly greater than that of the enlarged heads of said mounting elements and slotted retaining elements insertable between the'outer surface of said deflector element and the enlarged heads of respective mounting elements.

2. A diffuser comprising an outer casing defining an outwardly flaring portion, a central neck portion and an annular shoulder portion therebetween, a deflector element adapted for detachable association in spaced relationship with said outer casing, a threaded stem mounted centrally upon said deflector element, a damper member carried by said stem and movable within said neck portion, a plurality of mounting elements fixed to and depending from the annular shoulder of said outer casing, each of said elements having an enlarged head, each m Number of said elements having a stop member, a movable washer and a compression spring interposed therebetween, said deflector element having a plurality of mounting apertures therein, each of said apertures having a diameter slightly greater than that of the enlarged heads of said mounting elements and slotted retaining elements insertable between the outer surface of said deflector element and the enlarged heads of respective mounting elements.

3. A diffuser comprising an outwardly flaring outer casing, a disc-like deflector element adapted for detachable association in spaced relationship with said outer casing, a plurality of mounting elements depending from said outer casing, each of said elements having an enlarged head, each of said elements having a stop memher, a movable washer and a compression spring interposed therebetween, said deflector element having a plurality of mounting apertures therein, each of said apertures having a diameter slightly greater than that of the enlarged heads of said mounting elements, and slottedretaining elements insertable between the outer sur face of said deflector elements and the enlarged heads of respective mounting elements.

4. A diffuser comprising an outer casing defining an outwardly flaring portion, a central neck portion and an annular shoulder portion therebetween, a disc-like deflector elementadapted for detachable association in spaced relationship with said outer casing, a plurality of mounting elements fixed to and depending from the annular shoulder of said outer casing, each of said elements having an enlarged head, each of said elements having a stop member, a movable washer and a compression spring interposed therebetween, said deflector element having a REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Conklin Oct. 7, 1924 Aichele et al. 1 May 15, 1934 Ahlberg Apr. 13,1943

Number 2,369,119 Dauphinee Feb. 13, 1945 FOREIGN PATENTS Country Date 375,862 Great Britain July 4, 1932 Dauphinee Dec. 26, 1944' 

